Micro-controller controlled Pneumatic Power Draw Bar

[Doggggboy]

42 is THE answer to everything

 

[140mower]

I'm surprised no one has asked why every one of my projects is #42.

...... I doubt many of us can count that high....

 

[jcdammeyer]

...... I doubt many of us can count that high....

Try this then.
A=1, B=2, C=3,... Z=26. If you add together the numbers representing the letters MATH you get 42.

 

[YYCHM]

Try this then.
A=1, B=2, C=3,... Z=26. If you add together the numbers representing the letters MATH you get 42.

This was brought up before and I still don't get it. What significant about MATH = 42?

 

[jcdammeyer]

This was brought up before and I still don't get it. What significant about MATH = 42?

Math is the answer to life, the universe and everything. At least according to "The Hitchhiker's guide to the galaxy".

 

[PaulL]

Math is the answer to life, the universe and everything. At least according to "The Hitchhiker's guide to the galaxy".

And the question, apparently is "what is 6 x 9?" The implication, then, is that god has 13 fingers.

 

[Susquatch]

I'm surprised no one has asked why every one of my projects is #42.

I noticed but just thought it was funny. Don't change. That's a joke that never gets old. I'll keep laughing.

 

[jcdammeyer]

Anyway back to the draw bar...
Using the Alibre CAD I can create the parts and make sure there isn't any interference.
Then take those parts, remove the holes, change a few dimensions and add taper so it will pull out of the sand for casting.
They are now 3D printed. Next step is sand off the rough parts of the tapered posts. Add filler and primer and make them smooth enough to pull.
Then cast. Each plate is only just a tad thicker than 1/4"

 

[Former Member]

Math is the answer to life, the universe and everything. At least according to "The Hitchhiker's guide to the galaxy".

Throw yourself at the ground and miss.

 

[jcdammeyer]

Throw yourself at the ground and miss.

I do that all the time. Doesn't everyone??????

 

[6.5 Fan]

The last time i threw myself at the ground i didn't miss. Damn it is still harder than my body.

 

[jcdammeyer]

Found this video on a tool changer for a PCB drilling operation. It's an upside down version of what I'm trying to do and has other features that don't apply to a draw bar.

But overall the same idea that I'm pursuing now with the stepper motor and planetary drive for tightening/loosening. And like his my plan is to change the amount of current to the stepper motor to change the torque so there is more for loosening and less for tightening.

John

 

[jcdammeyer]

Yahoo. My tool height setter arrived. Not directly related to the drawbar project but for tool changing those few times where I need to use R8 instead of a TTS holder or if I put a different tool into a TTS holder and need to get the height of that into the LinuxCNC tool table.



Now to figure out where to wire it.

 

[jcdammeyer]

Needless to say I almost dropped everything just so I could play with it. Sensitivity is good. The over travel N/C switch opens and could be put in series with the Z travel limit switch.

Here's it sitting on the mill table at the tool change position which is almost at the X and Y limit switches.

http://www.autoartisans.com/mill/TouchProbe/TouchPosition-1.jpg

If I mount it there permanently I can see it will be constantly in the way. Going to have to figure out some sort of fast attach method.